In the motley final-year class 13e at Kepler School in Neukölln, children who have moved to the western part of the city legally as well as border crossers who live in East Berlin but commute to the West every day come together for lessons every day. After the school-leavers had completed their written exams in July 1961, they faced their oral exams after the summer vacation in September. But when the Berlin Wall was built in August, Berlin was divided and torn apart from one day to the next - including class 13e. The students from the eastern part of the city quickly have to make a difficult decision: should they attempt to cross the border or throw their dreams of the future to the wind?